H04Q 3 - Selecting arrangements

Patents for H04Q 3 - Selecting arrangements (38,975)
05/1977
05/31/1977	US4027109 Telephone call diverting system
05/31/1977	US4027108 Modular register and sender arrangement
05/31/1977	US4027104 Arrangement for automatically generating alternate telephone station identification codes
05/24/1977	US4025726 Cathode gate triggering method and system for speech path switches
05/24/1977	US4025725 Telecommunication switching network having a multistage reversed trunking scheme and switching on a four wire basis
05/17/1977	US4024361 Method of and means for identifying temporarily coacting units in a telecommunication system
05/17/1977	US4024360 Station checking network for telecommunication system
05/17/1977	US4024359 Continuity-checking network for telecommunication system
05/17/1977	US4024353 Key telephone system
05/17/1977	US4024352 Cross-point switch matrix and multiswitching network using the same
05/17/1977	US4024351 Telephone line battery boost circuit
05/10/1977	US4023141 Efficient one-sided rearrangeable multistage switching network
05/10/1977	US4022985 Key telephone system with a common push-button sender system
05/10/1977	US4022983 Telephone switching system having automated call hold facilities
05/10/1977	US4022982 Apparatus for rearrangement of a switching network
04/1977
04/19/1977	US4018995 Noise suppression circuit for switched telephone lines
04/12/1977	US4017829 Method and circuit arrangement for testing data processors
04/12/1977	US4017691 Number translator
04/12/1977	US4017690 Guard circuit for ground start telephone equipment
03/1977
03/29/1977	US4015190 Controllable negative resistance electronic switch arrangement
03/22/1977	US4013956 Telecommunication system with automatically switched modems
03/22/1977	US4013843 Marker for extending calls to remote junctions in a telecommunications system
03/22/1977	US4013000 Optical crossbar switching network
03/08/1977	US4011544 Control system having a programmed logic unit
03/08/1977	US4011543 Low crosstalk optical switch
03/08/1977	US4011517 Timer apparatus for incrementing timing code at variable clock rates
03/08/1977	US4011415 Call circuit for key telephone system for giving direct station selection call priority over station call
02/1977
02/22/1977	US4009352 Multiple link circuit for a port multiplexer
02/22/1977	US4009351 Switching arrangement for telecommunication switching systems
02/22/1977	US4009348 Fault bypass for a processor associated scanner
02/22/1977	US4009337 Stored program control type electronic exchange system
02/08/1977	US4007339 Arrangement serving operator assistance calls requiring routing back to originating offices
02/08/1977	US4007337 Arrangement and method of achieving a dial pulse muting function in a register sender PABX system
02/01/1977	US4006307 Impulse noise suppression circuit
01/1977
01/18/1977	US4004107 Telephone circuit to eliminate use of a hold button
01/18/1977	US4004103 Path-finding scheme for a multistage switching network
01/11/1977	US4002851 Telecommunication system controlled by stored program instructions
01/11/1977	US4002850 Trunk adapter
01/11/1977	US4002849 Scanning apparatus for detecting and analyzing supervisory and signaling information
01/04/1977	US4001789 Microprocessor boolean processor
01/04/1977	US4001517 Direct station selection hold arrangement
12/1976
12/21/1976	US3999019 Private automatic branch exchange providing line appearance connection of operator complex to single stage matrix
12/21/1976	US3999018 Timer associated with CB relay
12/21/1976	US3999013 Bi-directional signaling apparatus
12/14/1976	US3997736 Parallel control of a telephone switching network
12/14/1976	US3997735 Telephone station make-busy circuit
12/14/1976	US3997732 Call tracing and identification system
12/14/1976	US3997731 Apparatus for custom calling features in a telephone system
12/14/1976	US3997727 Time division multiplexed digital switching apparatus
12/07/1976	US3996567 Apparatus for indicating abnormal program execution in a process controlling computer operating in real time on different priority levels
12/07/1976	US3996566 Shift and rotate circuit for a data processor
12/07/1976	US3996426 Protection circuit for telephone switching system
12/07/1976	US3996424 Electronic telephone systems
11/1976
11/30/1976	US3995122 End mark controlled switching system and method
11/30/1976	US3995118 Call processing restoration arrangement for a telephone switching system
11/23/1976	US3993978 Solid state crosspoint circuit arrangement for use in a telephone exchange
11/23/1976	US3993880 Resistive battery feed for line circuits
11/23/1976	US3993874 Multi-stage switching networks for use in telecommunications exchanges
11/23/1976	US3993873 Digital switching for PABX telephone communication systems
11/23/1976	US3993872 Random number generator for a traffic distributor
11/23/1976	US3993871 Relay matrix for selector networks
11/16/1976	US3992592 Scanner-marker arrangement for telephone system
11/09/1976	US3991406 Program controlled data processing system
11/09/1976	US3991282 Multi station telephone switching system
11/09/1976	US3990780 Optical switch
10/1976
10/26/1976	US3988718 Logic control system
10/26/1976	US3988547 Telecommunication system having means for converting multifrequency selection signals into digital pulse trains
10/26/1976	US3988543 Inter-office signaling system for telecommunication network
10/19/1976	US3987381 Electronic controllable negative resistance arrangement
10/19/1976	US3987375 Transmission bridge exhibiting reduced distortion
10/19/1976	US3987257 Optically coupled two-wire to four-wire hybrid lines
10/19/1976	US3987249 System for addressed timemultiplexed telecommunication
10/12/1976	US3986174 Communication switching system
10/12/1976	US3985975 Holographic telephone switching system
10/12/1976	US3985973 Preference access circuit
10/12/1976	US3985971 Telephony
10/12/1976	US3985959 Key telephone system for subscribers
09/1976
09/28/1976	US3983339 Dynamic speed of answer recorder
09/28/1976	US3983332 Conference call circuitry for TDM signal exchange
09/28/1976	US3983331 Switch having a matrix of relays
09/14/1976	US3980834 Multi-stage connection switch frame
09/07/1976	US3979563 Communication systems of key telephone systems
08/1976
08/31/1976	US3978456 Byte-by-byte type processor circuit
08/31/1976	US3978327 Program-controlled data processor having two simultaneously operating identical system units
08/31/1976	US3978294 Return answer-supervisory circuit
08/31/1976	US3978293 Ringing control circuitry with shared ringing loop current detector
08/31/1976	US3978292 Ringing control circuitry with shared ringing loop current detector
08/24/1976	US3976847 Key telephone system intercom arrangement
08/24/1976	US3976845 Switching network having improved turn-on capability
08/17/1976	US3975597 Call queue release control circuit
08/17/1976	US3975596 Trunk consultation arrangement
08/17/1976	US3975594 Apparatus utilizing a phantom circuit for connecting additional subscribers to a telecommunication system
08/17/1976	US3975082 Laser beam coupling arrangement
08/10/1976	US3974343 Small modular communications switching system with distributed programmable control
08/10/1976	US3974341 Telecommunication exchange
08/03/1976	US3973143 Bias control circuitry for semiconductor bridge
08/03/1976	US3973142 Switch turn off circuitry for semiconductor bridge
07/1976
07/27/1976	US3971895 Ringing control circuitry with shared ringing loop current detector
07/27/1976	US3971893 Control system and process for a space-division switching network
07/27/1976	US3971892 Tdm switching networks

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